Door Alarm - Burglar Protection - 5 Different Possible Modes - 130 DB Batteries Included - for Home Security - Burglar Protection - Door Alarm Sensor

One-button control: This alarm bell does not require an additional remote control. It has a built-in power button and a setup button to adjust the volume and mode. Five modes: press the setup button once to activate alarm mode; press the setting button twice to activate doorbell mode; press the setting button three times to activate the 30-second alarm; press the setting button four times to activate the audible alarm; press the setting button five times to activate the 15-second alarm.Parameters: Built-in 3 LR44 batteries, dimensions: 65 x 34 x 16.5 mm.